Sheet metal working machine



June 30, 1931. P, R, HAHNEMANN 1,812,479

SHEET METAL WORKING MACHINE Filed sept. 25, 1928' LLL \\\ fdd/FM Patented June 30, 1931 UNITED STA-rias PATENT OFFICE PAUL R. HAHNEMANN, OF BUFFALO, NEW YORK, ASSIGNOR T NIAGARA MACHINE AND TOOL WORKS, OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK SHEET METAL WORKING MACHINE Application filed September 25, 1928. Serial No. 308,183.

This invention relates to a sheet metal working machine for beading, edging, turning and wiring sheet metal and has the object to produce a machine of simple, durable, efficient and inexpensive construction in which the housing is made in one piece, the horn is made separate from the housing and the gears for connecting the shafts are arranged within the housing and are inserted and removed through an opening in the rear end of the saine.

In the accompanying drawings:

Figure 1 is a side elevation of a metal working machine embodying my invention.

Figure 2 is a vertical longitudinal section of the same.

Figures 3 and 4 are vertical transverse sections taken on the correspondingly numbered lines in Fig. 2.

In the following description similar characters of reference indicate like parts in the several figures of the drawings:

The main frame of this machine is constructed in one integral body preferably by casting the same of metal and comprises a rear hollow part 10 which constitutes a housing or casing for enclosing some of the working parts of the machine, and an upper hollow overhanging supporting arm 11 which projects forwardly from the upper part of the housing 10.

This frame may be mounted in any suitable manner but preferably by means of a stein 12 projecting downwardly from the lower end of the housing 10 and adapted to engage a standard in the usual and well known manner in which machines of this character' are mounted. s v y The housing is provided in its front wall 13 with a horizontal and longitudinally extending opening 14, and between its front and rear ends the housing is provided with a Vtransverse bracket, web or partition 15 which has la horizontal longitudinal opening `16, this openind and the opening 14 in the lfront wall being both of cylindrical form and axially in line with each other.

The rear end or wall 17 of the housing is rovided with an opening 18 which normally 50 is preferably closed by means of a cover 19 detachably secured thereto by, means of screws 20 or other suitable fastening.

The numeral 21 represents a horizontal longitudinal horn of cylindrical form which is arranged below the arm of the frame and inserted with its rear part through the openings 14 and-16 in the front wall and bracket of the housing and is securely held therein both against turning and longitudinal movementhy means of a set screw 22 arranged in the side of the housing and engaging with the adlacent rear part of the horn 21, as shown in Figs. 1 and 3.

'At its front and rear ends this horn is provided vvith internal front and rear bearings 23, 24, in which the front and rear parts of a lower horizontal longitudinal shaft 25 are journaled.

At its front end this lower shaft is provided with a forming roll 26 which may have its periphery made of any desired form in erder to produce the required beading, edging, turning or wiring on the sheet of metal 27 by engaging the under or inner side of the latter. When this sheet is presented to the machine its advancing edge abuts against a gage 28 which is adjustably secured to the horn by means of a clamping screw 29 so as to adapt the machine for working on sheets of metal at different places thereon.

At its rear end the lower shaft is provided with a gear wheel 30 which abuts against the rear end of the horn, said lower shaft being provided near its front end with a rearwardly facing shoulder 31 which engages with the front end of the horn, whereby the shoulder 31 and the gear wheel 30 serve to hold the lower shaft against longitudinal movement.

Above the lower shaft is arranged a horizontal longitudinal upper shaft 32 which has its rear part extending through the upper part of the housing and its front part extending through the hollow under side of the frame arm 11 and the rear part of this upper shaft also extending through an opening 33 in the rear cover 19. At its front end the lupper shaft i`s provided with an upper forming roll 34 which has its periphery made in conformity with that of the lower roll 26 so that upon engaging with the upper or outer side of the sheet of metal 27 in cooperation withlthe lower roll 26 this sheet will be provided v'with the desired beading, edging, turning or'wiring in a well known manner by turning the shafts so that the opposing surface's of the rolls move in the same direction and move the sheet of metal between them as the forming operation of the latter pro-` esses. f Adjacent to its front and rear ends the upper shaft is journaled in an upper front bearing and an upper rear bearing 36. The rear bearing 36 is-pivotally mounted on the frame so as to permit the upper shaft to swing vertically for varying the distance between the rolls to suit the character, of. the work and the thickness of the sheet which isbeing operated upon. This pivotal connection between the rear bearing 36 and the frame is preferably effected by means of two -pivot screws or trunnions 37 working in threaded openings on opposite sides of the upper part of the housing and provided at the1r inner opposing ends with cones 38 which engage with pivot seats 39 on oppositesides of the rear bearing 36, each of said pivot screws being held in place after adjustment by means 'of a clamping nut 40 mounted thereon and engaging with the outer side of the housing, as shown in Figs. 1 and 2. y

The upper front bearing 35 is capable of moving vertically on the front part of the frame arm and is guided during this mover ment by providing its opposite side with vertical guide faces 41 engaging with corresponding vertical guide faces 42 on the opposing internal parts at the front end of the frame arm 11, as shown in Figs. 2 and 4. Downward movement of the upper front bearing 35 is produced by means of a vertical depressing screw 43 working in a threaded opening in the upper front part of the I Y frame arm and engaging its lower end with the top of the upper bearing 35, this screw being preferably provided with c1a.nk 44 at its upper end for convenience 11i turning the same. Upward movement of the upper front bearing 35 is effected by a yielding hfting device, which in the preferred const-ruction consists of an upright lifting rod 45 which passes through an opening 46 in the upper part of the frame arm 11 and .is secured to the'upper rear part of the bearing 35 by means ofa screw joint 47 and is provided at its upper end with a notched head' 48 so that the saine may be turned by means of a screw driver for attaching the same to or removing the same from its upper bearing.

The numeral 49 represents a helical spring surrounding the upper part of the lifting rod 45 within a socket 50 on the framearm and i bearing at its lowerend against the bottom of this socket while its upper end bears against the downwardly facing shoulder which is formed by the head or enlargement 48 on the upper end of the lifting rod.

Upon turning the depressing vscrew 43 in one direction theV front bearin 35 will be lowered and during this time t e spring 49 will be compressed, but upon reversing the rotation of the screw 43 so as to ermit this bearing 35 to rise, the resilience o the spring 49 will lift this bearing and hold the same in contact with the lower end of the screw 43, thereby permitting raising and lowering of this upper front bearing by merely manipulating the hand crank 44.

Rotation of the upper shaft 32 is effected by means of a` hand crank 51 applied to the rear end of the same, outside of the housing cover 19. Motionpis transmitted from the upper shaft 32 to the lower shaft 25 by Imeans of a gear wheel 52 secured to the rear part of the uppershaft andlmeshing with the lower gear wheel 30, as shown in Figs. 2

and 3. This upper gear wheel 52 engages with the rear side of the rear bearing 36, so as to prevent forward movement of the upper shaft while rearward movement of the same is prevented b means of a washer 53 interposed between t e front side of the bearing 36 and a rearwardly facing shoulder 54 on this shaft, as shown in Fig. 2.

The upper and lower gear wheels 52 and 30are inserted into the rear part of the housing for applying them tothe rear ends of the shafts, and these gear wheels are also removed froin these shafts and the housing through the opening 18 in the rear end of the housing, it being understood that during such insertion or removal of the gear wheels the rear cover 19 and the crank 51 are detached from the housing and upper shaft.

Due to this organization of the frame, the

manner of mounting the rear end of the horn thereon, and the means for inserting and removing the gear wheels through an opening in the rear end of the frame, the construction of the machine is materially simplified and its cost is reduced, and in addition thereto the eliciency of the machine is improved, inasmuch as there are less parts to look after or get out of order.

By making the frame hollow and in one piece and-the horn separate therefrom, the stiffness of the frame is materially increased, the saine forms a guard for the gearing, and it is possible to machine the horn more easily and at less cost. l

The means for effecting the vertical adjustment of the upper front bearing are also adhousing and an overhanging arm pro'ecting forwardly from the u per part of sai housing, .the lower part o said housing having a front wall, an intermediate inner transverse bracket and a rear wall provided with an opening; a separate lower horn passing at its rear end through said front wall and bracket and supported thereby; a lower shaft journaled in said horn and provided at its front end with a lower forming roll; an upper shaft passing through the upper part of the housing and under said arm and provided at its front end with an upper forming roll; an upper front bearing which is mounted on the front end of the arm and in which the front part of the upper shaft is journaled; an upper rear bearing which is'mounted on the upper part of the housing; and inter,- meshing gear wheels which are securedto the rear ends, respectively, of the upper and lower shafts and which are insertable and removable through the rear opening of said housing.

2. A metal working machine comprising a frame having a hollow rear part forming a housing and an overhanging arm projecting forwardly from the u per art of said housing, the lower part o said ousing having a front wall, an intermediate inner transverse bracket and a rear wall provided with an opening; a separate lower orn passing at its rear end through said front wall and bracket and supported thereby; a lower shaft journaled in said horn and provided at its front end with a lower forming roll; an u per shaft passing through the upper part o the housing and under said arm and provided at its front end with an upper forming roll; an upper front bearing which is mounted on the front end of the arm andinwhich the front part of the upper shaft is journaled; an upper rear bearing which is mounted in the upper part of the housing; intermeshing gear wheels which are secured tothe rear ends, res ctively, of the upper and lower shafts an which are insertable and removable through the rear opening'of said housing; and a cover for the rear opening of said housing. Y

3. A metal working machine comprising a frame having a hollow rear part fo a housin and an overhanging1 arm pro'ecting from t e upper art of said ousing, t e lower part of said ousing having spaced apart supports, a separate horn having its rear part mounted on said supports, and shafts mounted on said horn and ame and provided with cooperating forming rolls and driving gearing.

4. A metal working machine comprising a frame having a hollow rear part forming a housing and an overhanging arm projecting forwardly from the upper part of said housing, the lower part of said housing having a front wall, an intermediate inner transverse bracket and a rear wall provided with an opening; a.' separate lower horn passing at its rear end throu h said front wall an bracket and supporter? thereby; a lower shaft journaled in said horn and provided at its front end with a lower forming roll; an upper shaft passin through the upper part of the housing an under said' arm and provided at its front end with an upper forming roll; an upper front bearing which is mounted on the front end of the arm and in which the front part of the upper shaft is journaled; an upperrear bearing which is mounted in the upper part of the housing; intermeshin gear wheels which are secured to the rear en s, respectively, of the upper and lower shafts and which are insertable and removable through the rear opening of said housing, saidl upper front bearing being slidable verticall on said arm and said rear upper. bearing being pivoted on said housing to turn about a horizontal transverse axis, a vertical depressing screw working in the upper front part of the arm and engaging the upper side of said up er front bearin a vertical lifting rod passing through the ont lpart of said arm and connected at its lower end with said upper front bearing and provided at its upper end with a downwardly facing shoulder; and a spring interposed between the uppe side of said arm and the shoulder of said ro 5. A sheet metal working machine comprising a frame having a rear housing provided with a rear inlet and an overhangin arm projecting forwardly from said housing, a separate horn mounted on the lower art of the housing, shafts mounted on sai horn, arm and housing and provided with forming rolls, and intermeshing ear wheels mounted on the shafts within the ousing and adapted to be passed throu h said inlet. v

yIn testimony w ereof I hereby aiiix my signature.

PAUL R. HAHNEMANN. 

